Mechanical and Aerospace EngineeringCopyright (c) 2016 Syracuse University All rights reserved.http://surface.syr.edu/mae
Recent documents in Mechanical and Aerospace Engineeringen-usThu, 25 Aug 2016 07:25:26 PDT3600System Dynamics Modeling of Hybrid Renewable Energy Systems and Combined Heating and Power Generatorhttp://surface.syr.edu/mae/17
http://surface.syr.edu/mae/17Thu, 24 Sep 2015 12:25:19 PDT
The role of energy in the present world is critical in terms of both economical development and environmental impact. Renewable energy sources are considered essential in addressing these challenges. As a result, a growing number of organisations have been adopting hybrid renewable energy system (HRES) to reduce their environmental impact and sometimes take advantage of various incentives. When a HRES is being planned, the ability to model a HRES can provide an organisation with numerous benefits including the capability of optimising sub-systems, predicting performances and carrying out sensitivity analysis. In this paper, we present a comprehensive system dynamics model of HRES and combined heating and power (CHP) generator. Data from a manufacturing company using HRES and CHP generator are used to validate the model and discuss important findings. The results illustrate that the components of a HRES can have conflicting effects on cost and environmental benefits; thus, there is a need for an organisation to make trade-off decisions. The model can be a platform to further simulate and study the composition and operating strategies of organisations that are venturing to adopt new or additional HRESs.
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Krishna R. Reddi et al.Modelling Engineering Change Management in a New Product Development Supply Chainhttp://surface.syr.edu/mae/16
http://surface.syr.edu/mae/16Thu, 24 Sep 2015 12:25:17 PDT
The changes within a new product development (NPD) process are handled differently depending on the stage of the project. The changes during the initial stages of the project are addressed by design iterations, while the changes after the product design is complete are addressed using a formal engineering change management (ECM) process. The ECM process is a complex process, especially under a collaborative environment, where various independent entities work together for a common cause of product development. The interactions between the NPD and ECM processes have rarely been investigated in the research community. In this paper, we attempt to study the interactions between the various NPD and ECM process parameters by modelling the processes and simulated the model to understand the parameter interactions. The organisations in a supply chain have been characterised based on their interactions with the original equipment manufacturer (OEM) during the NPD process. The organisation process templates representing the NPD and ECM processes of each type of organisation in the supply chain have been modelled. The templates have been used to develop a simulation model representing the NPD and ECM processes for a supply chain. The process variables, such as processing rates, resources, resource composition, resource allocation priority, processing quality and phase overlap, have been included in the model. The results indicate that most of the variables and interactions among the variables have a significant influence on the NPD lead time. By identifying the status of the NPD process, the decision-makers can use these results to develop appropriate management policies to govern their product development projects.
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Krishna R. Reddi et al.Simulation Modeling for Sustainability: A Review of the Literaturehttp://surface.syr.edu/mae/15
http://surface.syr.edu/mae/15Tue, 15 Sep 2015 07:35:19 PDT
This article is a review of work published in various journals and conference proceedings on the topics of Simulation Modelling for Sustainability between January 2000 and May 2015. A total of 192 papers are reviewed. The article intends to serve three goals. First, it will be useful to researchers who wish to know what kinds of questions have been raised and how they have been addressed in the areas of simulation modelling for sustainability. Second, the article will be a useful resource for searching research topics. Third, it will serve as a comprehensive bibliography of the papers published during the period. The literature is analysed for application areas, simulation methods and dimensions of the triple bottom line model of sustainable development.
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Young B. MoonA Course in Sustainable Manufacturinghttp://surface.syr.edu/mae/14
http://surface.syr.edu/mae/14Thu, 10 Sep 2015 12:56:11 PDT
Sustainable manufacturing is a vision that the manufacturing community has for contributing to the global society's ability to address sustainability issues. While there is no standard definition of sustainable manufacturing, one universally accepted notion is that sustainable manufacturing must optimally address a comprehensive set of highly interdependent objectives from environmental, economic and social perspectives. This is impossible without systems' thinking that guides the sustainable manufacturing activities every step of the way from product idea generation, to adoption of sustainable design and manufacturing processes, to selection of sustainable materials, and ultimately to product disposal, reuse or recycling. New course on sustainable manufacturing has been developed and offered several years now at Syracuse University, USA. An underlying principle in developing and offering the course is the premise that sustainability manufacturing requires a holistic view to a complete product lifecycle from the moment of conceiving new product ideas till the end of the product life, while simultaneously considering the impact of decisions made in each phase of the manufacturing activity on sustainability. The principle has been realized by: (i) adoption of a broadened definition of manufacturing and (ii) a semester-long project of developing sustainable products. In the course, manufacturing means not only material transformation processes but also manufacturing systems including supply chain considerations for sustainability. The sustainable product development project provides students with a context where they can apply methods, techniques and tools being acquired from the course. Also the developed products can lead to further entrepreneurial opportunities.
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Young MoonModel-Based Approach to Account for rhe Variation of Primary VOC Emissions Over Time in the Identification of Indoor VOC Sourceshttp://surface.syr.edu/mae/13
http://surface.syr.edu/mae/13Thu, 04 Oct 2012 08:25:15 PDT
The study objectives were to improve the understanding of the long-term variation of VOC emission chromatograms of building materials and to develop a method to account for this variation in the identification of individual sources of VOC emissions. This is of importance for the application of the source identification method since materials age over time in real indoor environments. The method is based on the mixed air sample measurements containing pollutants from multiple aged materials and the emission signatures of individual new materials determined by PTR-MS. Three emission decay source models were employed and evaluated for their ability to track the change of individual material emission signatures by PTR-MS over a nine-month period. Nine building material specimens were studied in a ventilated 50-L small-size chamber for their emissions individually for nine months, and also in combination later. Chamber exhaust air was sampled by PTR-MS to construct a temporal profile of emission signature unique to individual product type. The similar process was taken to measure mixture emissions from multiple materials, which is for applying and validating the developed method for source identification enhancement, considering the variation in long-term emission rates of individual VOCs. Results showed that the proposed approach could predict the emission signatures of individual building materials at a later time (9-month) with less than 6% difference variance, and hence indicated the potential of the source identification method for aged materials in real indoor environments.
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Kwanghoon Han et al.Negative Pressure Characteristics of an Evaporating Meniscus at Nanoscalehttp://surface.syr.edu/mae/12
http://surface.syr.edu/mae/12Fri, 03 Feb 2012 12:09:05 PST
This study aims at understanding the characteristics of negative liquid pressures at the nanoscale using molecular dynamics simulation. A nano-meniscus is formed by placing liquid argon on a platinum wall between two nanochannels filled with the same liquid. Evaporation is simulated in the meniscus by increasing the temperature of the platinum wall for two different cases. Non-evaporating films are obtained at the center of the meniscus. The liquid film in the non-evaporating and adjacent regions is found to be under high absolute negative pressures. Cavitation cannot occur in these regions as the capillary height is smaller than the critical cavitation radius. Factors which determine the critical film thickness for rupture are discussed. Thus, high negative liquid pressures can be stable at the nanoscale, and utilized to create passive pumping devices as well as significantly enhance heat transfer rates.
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Shalabh Maroo et al.Combined Heat, Air Moisture and Pollutant Simulations (CHAMPS) For Buildingshttp://surface.syr.edu/mae/11
http://surface.syr.edu/mae/11Tue, 24 Jan 2012 10:17:22 PSTJianshun Zhang et al.Understanding SVOCshttp://surface.syr.edu/mae/10
http://surface.syr.edu/mae/10Mon, 23 Jan 2012 11:33:49 PST
Semi-volatile organic compounds (SVOCs) are an important class of indoor pollutants that are of great health concern. However, they have not received much attention within the ASHRAE community. This column provides an overview of the sources, sinks, transport mechanisms, and potential health effects, and discusses how HVAC systems may affect occupants’ exposure to SVOCs.
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Ying Xu et al.Enhancing systems integration by incorporating business continuity drivershttp://surface.syr.edu/mae/8
http://surface.syr.edu/mae/8Thu, 27 Jan 2011 08:43:49 PST
Purpose – The purpose of this paper is to present a framework for developing an integrated operating environment (IOE) within an enterprise information system by incorporating business continuity drivers. These drivers enable a business to continue with its operations even if some sort of failure or disaster occurs.

Design/methodology/approach – Development and implementation of the framework are based on holistic and top-down approach. An IOE on server’s side of contemporary business computing is investigated in depth.

Findings – Key disconnection points are identified, where systems integration technologies can be used to integrate platforms, protocols, data and application formats, etc. Downtime points are also identified and explained. A thorough list of main business continuity drivers (continuous computing (CC) technologies) for enhancing business continuity is identified and presented. The framework can be utilized in developing an integrated server operating environment for enhancing business continuity.

Originality/value – This paper presents a comprehensive framework including exhaustive handling of enabling drivers as well as disconnection points toward CC and business continuity.

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Bajgoric Nijaz et al.A framework for managing engineering change propagationhttp://surface.syr.edu/mae/7
http://surface.syr.edu/mae/7Thu, 27 Jan 2011 08:43:47 PST
Engineering Changes (ECs) are facts of life for any company developing and introducing new products, despite a commonly held notion that they are distractions from normal operation. Companies can become more innovative by utilising ideas from the ECs or by learning how to handle the ECs. This paper presents a framework to manage the ECs effectively, particularly the issue of EC propagation. An EC seldom confines itself to a single change, but triggers other changes in different components. The framework is designed to identify the affected components automatically, capture the required knowledge during the design phase of the product life cycle, and use it during the Engineering Change Management (ECM) process.
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Krishna Reddi et al.Enterprise resource planning survey of Korean manufacturing firmshttp://surface.syr.edu/mae/6
http://surface.syr.edu/mae/6Thu, 27 Jan 2011 08:42:10 PST
Enterprise Resource Planning (ERP) systems are packaged software designed to integrate and optimise the business processes of an enterprise. The ERP systems have been embraced by industry as a de facto solution to integrate their business functions. The adoption of the ERP concept is a truly global phenomenon. This paper reports a recently completed survey study on Korean manufacturing firms. The study used the same survey questionnaires used in two previous surveys done on US and Swedish manufacturing firms. Our objective is to determine the extent of adoption of the ERP system in the Korean manufacturing firms, their motivations, implementation strategies and benefits obtained, and to provide useful data to draw similarities and differences between different countries’ practices.
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Lee TaeHyung et al.Enhancing ERP system’s functionality with discrete event simulationhttp://surface.syr.edu/mae/5
http://surface.syr.edu/mae/5Thu, 27 Jan 2011 08:42:09 PST
Purpose – To develop a methodology to augment enterprise resource planning (ERP) systems with the discrete event simulation’s inherent ability to handle the uncertainties.

Design/methodology/approach – The ERP system still contains and uses the material requirements planning (MRP) logic as its central planning function. As a result, the ERP system inherits a number of shortcomings associated with the MRP system, including unrealistic lead-time determination. The developed methodology employs bi-directional feedback between the non-stochastic ERP system and the discrete event simulation model until a set of converged lead times is determined.

Findings – An example of determining realistic production lead-time data in the ERP system is presented to illustrate how such a marriage can be achieved.

Research limitations/implications – The research demonstrates that the limited planning functionality of the ERP system can be complemented by external system such as discrete event simulation models. The specific steps developed for this research can be adopted for other enhancements in different but comparable situations.

Practical implications – The organizations who have been using the discrete event simulation in their planning and decision-making processes can integrate their simulation models and the ERP system following the steps presented in this paper. The ideas in this paper can be used to look for automatic data collection process to update or build the simulation models.

Originality/value – The ERP implementation is a significant investment for any corporation. Once the ERP implementation is completed successfully, the corporations must look for ways to maximally return on their investment. The research results may be used to enhance the implemented ERP systems or to fully utilize the capabilities in a corporation.

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Young Moon et al.Enterprise Resource Planning (ERP): a review of the literaturehttp://surface.syr.edu/mae/4
http://surface.syr.edu/mae/4Thu, 27 Jan 2011 08:34:33 PST
This article is a review of work published in various journals on the topics of Enterprise Resource Planning (ERP) between January 2000 and May 2006. A total of 313 articles from 79 journals are reviewed. The article intends to serve three goals. First, it will be useful to researchers who are interested in understanding what kinds of questions have been addressed in the area of ERP. Second, the article will be a useful resource for searching for research topics. Third, it will serve as a comprehensive bibliography of the articles published during the period. The literature is analysed under six major themes and nine sub-themes.
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Young MoonThe Open Assembly Model for the Exchange of Assembly and Tolerance Information: Overview and Examplehttp://surface.syr.edu/mae/3
http://surface.syr.edu/mae/3Tue, 05 Oct 2010 09:02:52 PDT
In early design phases an effective information exchange among CAD (Computer Aided Design) tools depends on a standardized representation for the product data in all PLM (Product Lifecycle Management) tools. The NIST Core Product Model (CPM) and its extension are proposed to provide the required base-level product model that is open, non-proprietary, generic, extensible, independent of any one product development process and capable of capturing the full engineering context commonly shared in product development [1]. The Open Assembly Model (OAM) Model extends CPM to provide a standard representation and exchange protocol for assembly. The assembly information model emphasizes the nature and information requirements for part features and assembly relationships. The model includes both assembly as a concept and assembly as a data structure. For the latter it uses the model data structures of ISO 10303, informally known as the Standard for the Exchange of Product model data (STEP)[2]. The objective of the paper is to show how the OAM can be used to realize seamless integration of product information, with an emphasis on assembly, throughout all phases of a product design. A gearbox design example is used to illustrate the process.
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M. M. Baysal et al.Guidelines for the development of computer-based instruction modules for science and engineeringhttp://surface.syr.edu/mae/2
http://surface.syr.edu/mae/2Tue, 05 Oct 2010 08:48:30 PDT
The design and development of a prototype computer-based instruction (CBI) module is described. The module covers introductory structural analysis techniques and demonstrates the practicality of CBI for undergraduate engineering education. The module’s generic learning objectives are used to develop a set of guiding principles for CBI development. Choice of authoring software and the module architecture are presented, followed by the details of the user interface, logic, and screen layout. The module design and software development process outlined here are easily extended to computer-based tutorials that present problem solving methods for engineering, mathematics, and the natural sciences.
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Jessica R. Lux et al.The Open Assembly Model for the Exchange of Assembly and Tolerance Information: Overview and Examplehttp://surface.syr.edu/mae/1
http://surface.syr.edu/mae/1Tue, 05 Oct 2010 08:48:29 PDT
In early design phases an effective information exchange among CAD (Computer Aided Design) tools depends on a standardized representation for the product data in all PLM (Product Lifecycle Management) tools. The NIST Core Product Model (CPM) and its extension are proposed to provide the required base-level product model that is open, non-proprietary, generic, extensible, independent of any one product development process and capable of capturing the full engineering context commonly shared in product development [1]. The Open Assembly Model (OAM) Model extends CPM to provide a standard representation and exchange protocol for assembly. The assembly information model emphasizes the nature and information requirements for part features and assembly relationships. The model includes both assembly as a concept and assembly as a data structure. For the latter it uses the model data structures of ISO 10303, informally known as the Standard for the Exchange of Product model data (STEP)[2]. The objective of the paper is to show how the OAM can be used to realize seamless integration of product information, with an emphasis on assembly, throughout all phases of a product design. A gearbox design example is used to illustrate the process.
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M. M. Baysal et al.